Weather in Sihanoukville in December 2025
- December is usually the driest month of the year in Sihanoukville
Average weather
Average temperature in Sihanoukville in December
The temperature in December is +30°C on average, with a range between a maximum of +32°C during the day and a minimum of +24°C at night.
The average maximum temperature goes down 12% by the end of the month, compared with the beginning of the month, from +32°C to +31°C.
Is Sihanoukville warm or cold in December?
Sihanoukville is typically warm in December.
Maximum temperatures go up compared to the previous month from +29°C to +29°C. The minimum temperature also goes up from +25°C to +25°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how December is compared to other months in Sihanoukville:
Climate in Sihanoukville in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +29°C | +29°C | ||||
| Min. temperature | ||||||
| +21°C | +20°C | +21°C | ||||
| Max. temperature | ||||||
| +32°C | +32°C | +33°C | ||||
| Rainfall | ||||||
| 77 mm | 24 mm | 25 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 77% | 73% | 76% | ||||
| Air pressure | ||||||
| 1009 HPa | 1010 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 2 | 3 | 3 | ||||
| Cloudy days | ||||||
| 8 | 16 | 11 | ||||
| Rainy days | ||||||
| 20 | 12 | 17 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December often has better weather than November. The temperature levels stay the same in the area of +29°C for average maximum temperature during the day. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 77 mm to 24 mm. It feels drier, as humidity decreases from 77% to 73%. The average wind speed doesn’t change much during December, staying around 2 m/s. The good news is there are likely to be more sunny days in December, from 2 to 3.
January brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Sihanoukville is gradually increasing during December, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last December in Sihanoukville?
Climate Change over Years
The climate in Sihanoukville in December has not changed much over the last 43 years.
The average temperature was the lowest in 1999 (+29°C) and the highest in 2024 (+30°C). The driest year was 2014 with only 2645 mm of rainfall, and the wettest year was 2006 with 4069 mm.
FAQ
Is December a good time to visit Sihanoukville?
Can you sunbathe in Sihanoukville in December?
Is Sihanoukville rainy in December?
Is it sunny in Sihanoukville in December?
Other cities in Cambodia
Monthly weather in Sihanoukville
Source of the data
For this page, we’ve looked at the typical weather in Sihanoukville, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
